Family and friends will gather at Clapham's Fenwick Place estate this afternoon to mark the first anniversary of Billy Cox's murder.

The fatally injured Clapham teen was found by his younger sister after she heard a loud bang while returning to their home in Fenwick Place at 3.30pm on Valentine's Day last year.

She cradled his dying body while a friend and ambulance crew desperately tried to save her brother.

But despite their aid Billy was pronounced dead at the scene.

A postmortem examination gave the cause of death as a gunshot wound to the chest.

Billy, known as Remer by his friends, was wearing an electronic tag as part of a supervision order following a burglary offence and was allegedly a member of the Clap Town Kids - a Clapham gang.

He was also under a curfew, meaning he had to be home between 7pm and 7am.

Police leading the investigation into Billy's murder today renewed their appeal for information.

Acting Detective Chief Inspector Tony Boughton from operation Trident said they are still keeping an open mind about the motive and, as there were no signs of forced entry, it is possible Billy knew his attackers.

Billy's funeral service was held at West Norwood Cemetery, Norwood High Street, last April.

The original appeal

Billy's dad paid an emotional tribute to his son following the shooting and begged the public to help catch his killer.

Tommy Cox said: "We are missing Billy so much. He was not perfect but he was dearly loved as a son and brother.

"He was waiting for a place at college where he could continue working for GCSEs."

He added: "I want everyone to get behind the police one hundred per cent. If you have anything to say, tell the police. We need to catch my boy's killers."

Although police spoke to around 500 people in the week following Billy's murder his killer has yet to be caught.

A 20-year-old Clapham man arrested on suspicion of murder remains on bail to return to a police station. Four men arrested on suspicion of possession of Class A drugs with intent to supply also remain on bail.

Anyone with information should call Crimestoppers on 0800 555 111.